Paper-stock-refining engine.



No. 717,718. PATENTED JAN. 6, 1903. G. SAEGKER.

PAPER STOCK REFINING ENGINE.

APPLICATION TILED OUT. 3,1902.

N0 MODEL.

UNITED STATES PATENT OFFICE.

HERMAN G. SAECKER, OF APPLETON, WISCONSIN.

PAPER-STO CK-REFINING ENGINE.

SPECIFICATION forming part of Letters Patent No. 717,718, dated January6, 1903.

I Application filed October 3, 1902. Boris-1N0. 125,792. (No model.)

To all whom it may concern:

Be it known that I, HERMAN G. SAEOKER, a citizen of the United States,and a resident of Appleton, in the county of Outagamie and State ofWisconsin, have invented certain new and usefullmprovements inPaper-Stock- Refining Engines; and Ida hereby declare that the followingis a full, clear, and exact description thereof.

My invention relates to the conical cores of Jordan typepaper-stock-refiuing engines, and has especial reference to that speciesof such a core provided with annularly-recessed bands at intervals ofits length, ribs arranged longitudinally of the core between bandsthereon, knives having notched ends fitting the recessedbands, andwooden spacers confining the vknives in series between core-ribs.

The object of the invention is to prevent displacement of thespacers bymoisture and centrifugal force; and said invention consists in providingthe knives-with apertures into which there is swell of the spacermaterial, as is hereinafter more particularly set forth with referenceto the accompanying drawings and subsequently claimed.

Figure l of the drawings represents a longitudinal section of a portionof that species of paper-stock-refihing-engine core to which myinvention has especial reference; Fig. 2, a transverse section of thesame, illustrating an assemblage of ribs, knives, and spacers thereon,the spacers being positioned in a dry state ready to swell intoapertures with which the knives are provided; and Fig. 3, a perspectiveview of one of the knives.

Referring by letter to the drawings, A indicates a portion of a conicalcore that pertains to a paper-stock-refining engine, and which isprovided with annularly-recessed bands B, fast thereon at intervals ofits length. Ghanneled ribs 0, arranged longitudinally of the core,between the bands of same, are held in place by machine-screws D, and afilling E is arranged in the rib-channels. Alternately disposed betweenthe ribs 0 are knives F and wooden spacers G,the knives being notched attheir ends to engage with the corebands. The spacers are of blunt-wedgeform and serve to hold the knives in place, the general construction andarrangement of parts thus far specified with particular reference to thedrawings being old in Patent No. 653,856, of July 17, 1900.

The spacers are dry when put in place, and owing to moisture andcentrifugal force they have a tendency to slip outward, and thus becomeineffective as means for holding the knives rigidly in working position.To prevent outward movement on the part of the spacers when affected bymoisture and centrifugal force, the knives F are each provided with aplurality of apertures 19, circular or otherwise, at intervals oftheirlength between the core-bands. Absorption of moisture by thespacers causes them to swell into the knife-apertures, and thusautomatically key themselves in place to obviate the trouble heretoforeexperienced.

Having thus described myinvention, what Iclaim'as new, and desire tosecure by Letters Patent, is-

1. The core of a paper-stock-refinin g engine provided withannnlarly-recessed bands at intervals of its length, ribs arrangedlongitudinally of said core between bands thereon, knives that havingend notches engaged by the bands are apertured intermediate of saidbands, and wooden spacers confining the knives in series betweencore-ribs, there be ing swell of spacer material into said apertures ofthe knives when afiected by moisture to automatically key said spaces inplace.

2. A paper-stock-refining engine having the knives thereof provided withapertures between retaining-bands on said core, and wooden spacersalternating with said knives, there being swell of spacer material intothe knife-apertures when afiected by moisture to automatically key saidspacers in place.

3. A paper-stock-reiining-engine core having each knife thereof providedwith a plurality of apertures provided at intervals longitudinallythereof between the knife-retaining bands of the core to be engaged .bymaterial of the adjacent wooden spacers when these spacers are affectedby moisture, whereby said spacers are automatically keyed in place.

In testimony that I claim the foregoing I have hereunto set my hand, atAppleton, in

the county of Outagamie and State of Wis cousin, in the presence of twowitnesses.

HERMAN G. SAECKER.

Witnesses:

P. M. CoNKnY, THOMAS OKEEFE.

